Jeffrey j



I J. 1. POWER.

DUST COLLECTOR.

APPLIICATION FILED DEC-7,1916. 1,308,961. Patented July 8,1919.

2 SHEETS-SHEET I- //vv/vT on v WITNESSES- I 7 ZZ' BY Q4: A g

UNITED sTATEs PATENT OFFICE.

JEFFREY J. POWER, OF MADISON, WISCONSIN. ASSIGNOR TO POWER, STEVENS FAN DEVICES COMPANY, OF MADISON, WISCONSIN, A CORPORATION OF WISCONSIN.

DUST-COLLECTOR.

Specification of Letters Patent.

Patented July 8, 1919.

Application filed December 7, 1916. Serial No. 135,537.

consin, have invented new and useful Im provements in Dust-Collectors, of which the following is a specification.

My invention relates to improvements in dust collectors for grinding wheels, buffing wheels, etc.

The object of my invention is to provide means whereby dust and grit from an abrading wheel may be effectually collected and withdrawn without obstructing the working faces of the wheel in a manner to interfere with grinding or 'bufling operations.

More particularly, the object of my invention is to provide means for overcoming the inertia of particles thrown off by centrifugal force from a grinding or butling wheel in such a manner as to permit an effectual withdrawal of such particles from all sides of the wheel through a suction nozzle located at one side thereof.

In the drawings Figure 1 is a side elevation of an abrading apparatus embodying my invention.

Fig. 2 is a front elevation of the same partly in vertical section.

Like parts are identified by the same reference characters in both views.

In the drawings, A is a grinding wheel and B a buffing wheel mounted upon the respective ends of a shaft C. D, D are suction fans, the rotary members of which are mounted upon a shaft D preferably parallel with the shaft C and driven therefrom. The fan is similar to that disclosed in my former patents, Reissue No. 12655, dated May 21, 1907 and No. 1033929, dated July 30, 1912, and therefore need not be specifically described herein. Each fan is provided with a feed-way or suction nozzle E, the

inouthE of which is located directly underneath the abradin-g wheel. In the construction illustrated, the right hand suction nozzle E, in Fig. 2, is located with its mouth directly below the grinding wheel.A. The left hand suction nozzle has its mouth located directly below the bufling wheel B. The mouths of the suction nozzles are preferably covered byascreen e.

The out-let duct F of each fan' is tangential as shown and described in my former patents, but in the construction shown, this duct is curved downwardly to pass underneath the fan to a suitable point of discharge and a smaller auxiliary duct G is connected with the main discharge duct F and extends upwardly to a point above the shaft C where it is elbowed at g and provided with an'extension H substantially parallel with the *shaft C and leading to a point above the abrading wheel, where it is again elbowed at g and extended downwardly to form a blast nozzle H adapted to deliver air against the periphery of the grinding wheel at the upper side of the latter. A segmental shield I covers the rear portionof the a brading wheel and the blast nozzle H extends through this shield. The shield has side flanges I, whereby the periphery of the grinding wheel is partially inclosed by the shield on ther'ear side. The blast nozzle H delivers air against the grinding wheel within its shield and the'shield directs this air downwardly along the periphery of the grinding wheel. and also along the sides thereof in the direction of the suction nozzle E. j

It will be observed that the auxiliary pipe or duet G is connected with the main discharge duct F substantially at the elbow F. It will also be observed that the horizontal portion f of the outlet duct is somewhat smaller than the downwardly turned portion F. Therefore a considerable portion of the air delivered by the fan will be diverted through the pipe G to the blast noz-. zle H and dischar ed against the grinding wheel underneath the shield I. y s It will also be observed that the: auxiliary pipe or duct Gand also the fan itself are located in close proximity to the standard J which carries the bars J for the shaft C, said auxiliary pipe extending upwardly we point above shaft C, along a line which is distant from the projecting wheel so that The elbows allow the pipe sections to be this pipe will not interfere with. the work.

rotated to some extent upon, each other and,

if desired, one or more of the pipe sections may be made somewhat flexible, whereby the shield I may be adjustedin case the requirements of the work demand the exposure of a greater surface of the grinding wheel or a shifting of the shield either toward or away frointhe wheel. Ordinarily, however, little, if any, adjustment will-be'i-equired, for the reason that the entire. front portion and nearly all of the side portions of the wheel are exposed. v e r In use, the abrading wheel will ordinarily revolve in the direction indicated. by the arrow in Fig. l. The work will be applied to the. front or exposed face of the periphery and the abraded particles will therefore be thrown directly downward into the mouth E of the suction nozzle, if. immediately dis charged from the wheel, I But, owing to the rapid movement of the wheel, a considerable number of particles will be carried around to points distant from the points of contact h h W r f r l vih t e Pe pher e t abre ghe s e m em l of the wheel tends to set the air in motion adjacent thereto and tinder ordinary conditions a revolving current or film of air is carried around with'the wheel and thrown off in all directions by centrifugal force carrying' with it particles of dust and grit. I r hi enden y b mean f the b a nozzle H whichbrealis up and neutralizes the force of the air current and also destroys t ei e t mef th mev g pe tie s oer: ried around ,with th'e wheehwhich. would otherwise be thrown oil in lipward direction. These particles therefore drop or'are carried with the downwardly moving air blast from the nozzle H either into the suct en ettle t tefe n e e hey er r u t With n th h i l nee of the hi 'e m vin h i Sai h'e The mom ntum imparted to these particles by the abradm'gvhee a n been the ke t r e si y ee lf e inte' the tieh n z as $0011 as y. er caugh b t e section e rents- 191101 ife 'e d t h eld 1 a essential to my i ent n i it s mi teht f e r eeh het it .dij rifhi e th ai bhtet in ve :fihn ev rtheeht r eer pie tie e -t per r ef e hee and d n et y e n th sid s her et th r f re p f to hee h shield wherever the nature of the work will P rmi e i The Spe fi locat eft le n z e it se s; n ttle E ie ls no ee e'hti l bu the e eti nettl E s pr ably eee d low t e er hdi g when for th ei 'ii tha i s ei t e hewey he n. thi esi ion an it is. el e in h bes po t en. w di t e ei ee eeeaer iqhe ti y e duetiie el wh oh by the r n heel nd or ne' y n tie e- The blast riflzzle ehould be located on the opposite side 9 the abredin wh l i om th 'eh ee: zleandpartlcularly, it should so located ft eet the le t e h u wa y n ing. side of. the wheel. It is not necessary tha t she til h nee diam r a y p site the suction nozzle butit is preferaiil located, a little on c rear of the vertical center line of theabrading wheel.

A valve 0, preferably of a damper or butterfly type, is employed to control the dethe damper may be. securely held in any desired position of adjustment.

I claim r 1. The combination with an abrading wheel, of a suction nozzle adjacent. to the periphery of the wheel on one side thereof, a blast nozzle adjacent to the wheel "eriph'ery on the opposite side, means for wit drawing air through the suction nozzle, and. means for delivering air through the blast nozzle in the direction of the suctiennozzle, whereby the whirling currents of air may be broken up and the-particles of dust allowed to drop into the zone of air suction.

2'- h c at n. W t an e t di wheel, of a suction nozzle adjacent to the periphery of the wheel on the-lower side thereof, and means for delivering a downwardly moving blast of eir along the. upwardly moving sides and rim portions of the wheel. I

3. The combination with an abrading wheel, of a suction nozzle adjacent to the periphery of the wheel on the lower side thereof, and means for destroying the inomentum of disengaged particles of matter a ong t newer 1y .me n i es e d. i portions of the wheel, whereby such partil' 'e h me i bi e the h en e'ef gra i a d t e e wa y m v n i rents passing to said suctioiinozzle,

v .4, The. combination with an abradiiig Whe O e tion n z ehev hg eh enet nle iniprex mi ynto he w l p i h cry on one side, means r01 establishing efiec tiv: suction thi'bugh the end portions of said e l i I e nfe. fe d liv i g'a blast o ai against the abrading wheel at the side thereef which eee m the ez l e t he l is ete e ,a dv eh d u ta l shield ext d n er 'h d e ner p rt ef th Whe onthe side thereof which receives the blast. 51 Th om in t on w th ah a r dh Wheel .e suc n he Zl e i e n to t e; riphery of the wheel on oneside thereof, a

blast nozzle adjacent to the wheel periphery 0n the opposite side, a rotary fanhaving a suction inlet connected with said suction nozzle and provided with ainain discharge duct and an auxiliary discharge duct leading fromthe main discharge duct to the blast nozzle.

6. The combination with e an abrading wheel of a suction nozzleadjacent to the int 1,308,961 r I B gerlphery of the wheel on one side thereof, a, delivery of air through the auxiliary duct last nozzle adjacent to the wheel periphery to the blast nozzle. 10 on the opposite side, a rotary fan having a, In testimony whereof l afix my signature suction inlet connected with said suction in the presence of two witnesses.

5 nozzle and provided with a main discharge JEFFREY J. PUWER.

duct and an auxiliary discharge duet leading Witnesses: from the main discharge duct to the blast LEDROY W. STEVENS,

nozzle, and a valve adapted to control the LEVERET'I C. WHEELER. 

